6400000036 has 6 divisors (see below), whose sum is σ = 11200000070. Its totient is φ = 3200000016.

The previous prime is 6400000031. The next prime is 6400000049. The reversal of 6400000036 is 6300000046.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6400000000 + 36 = 80000^2 + 6^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6399999959 and 6400000022.

It is not an unprimeable number, because it can be changed into a prime (6400000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800000001 + ... + 800000008.

Almost surely, 2^6400000036 is an apocalyptic number.

It is an amenable number.

6400000036 is a deficient number, since it is larger than the sum of its proper divisors (4800000034).

6400000036 is a wasteful number, since it uses less digits than its factorization.

6400000036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600000013 (or 1600000011 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 6400000036 is about 80000.0002250000. Note that the first 3 decimals coincide. The cubic root of 6400000036 is about 1856.6355369263.

It can be divided in two parts, 64000000 and 36, that multiplied together give a square (2304000000 = 48000²).

The spelling of 6400000036 in words is "six billion, four hundred million, thirty-six", and thus it is an aban number.